Connecting structure of sectional type extrusion screw

Abstract

The invention discloses a connecting structure of a sectional type extrusion screw. An external spline is arranged at the left end of a left section screw of the structure, a first counter bore is formed in the right end of the left section screw, an internal thread and a pin hole are formed in the inner wall of the first counter bore, and the left end of a middle section screw is a first necking section with an external thread and is provided with a pin hole perpendicular to the axis. The first necking section at the left end of the middle section screw is screwed into the first counter bore in the right end of the left section screw, a first pin shaft is inserted into the first counter bore and the pin hole of the first necking section, a second counter bore is formed in the right end of the middle section screw, an internal thread and a pin hole are arranged on the inner wall of the second counter bore, and the left end of the right section screw is a second necking section with an external thread and is provided with a pin hole perpendicular to the axis. A second necking section at the left end of the right-section screw is screwed into a second counter bore at the right end of the middle-section screw, a second pin shaft is inserted into a pin hole of the second counter bore and a pin hole of the second necking section, and the right end of the right-section screw is a discharge port and is connected with a discharge port die. The sectional part of the structure is easy to disassemble, the replacement of the worn section is convenient to realize, and the manufacturing cost of the extrusion screw is effectively reduced.

Description

technical field [0001] The invention relates to the technical field of mechanical equipment, in particular to a connection structure of segmented extrusion screws. Background technique [0002] Extrusion screw, as a tool to complete the homogenization of materials in a molten state, needs to have the characteristics of high reliability, strong self-lubricating ability, and less residual material. Its performance mainly depends on the working state and structural performance of the extrusion screw. Bad. Extrusion screw has superior productivity and mixing performance, and can be used for modification of engineering plastics. Therefore, it is favored by the majority of users, thus promoting the upsurge of developing new extrusion screws to meet high-quality, high-performance engineering needs of plastic products. [0003] In the working process of the extrusion screw, the wear of the screw and the barrel is inevitable. Due to the high manufacturing cost of the screw, and onc...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a segmented extrusion screw connection structure. This structure overcomes the defects of the traditional extrusion screw surface strengthening treatment, and can not only meet the high pressure conveying environment that the existing extrusion screw needs to provide. Moreover, the section is easy to disassemble, which facilitates the replacement of the worn section and effectively reduces the manufacturing cost of the extrusion screw.

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